| TROUBLESHOOTING | |||
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| Observe all Safety Guidelines detailed throughout this manual | ||
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| PROBLEMS | POSSIBLE CAUSE | RECOMMENDED |
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| (SYMPTOMS) | COURSE OF ACTION | |
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2. | Variable or “hunting arc. | a. Wrong size, worn and/or melted |
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| contact tip. - Replace if neces- |
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| sary. |
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| b. Worn work cable or poor work |
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| connection. - Replace if neces- |
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| sary. |
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| c. Loose electrode or work cable |
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| connections. |
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| d. Wrong polarity. - Make sure elec- |
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| trode polarity is correct for | If all recommended possible areas of |
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| process being used. | misadjustment have been checked |
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| e. Gas nozzle extended beyond gun | and the problem persists, Contact |
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| your local Lincoln Authorized | |
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| tip or wire stickout too long while | Field Service Facility. |
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| welding. |
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| f. Poor gas shielding on processes |
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| requiring gas. - Check gas flow |
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| and mixture. |
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3. | Poor arc striking with sticking or | a. Improper procedures or tech- |
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niques. - See “Gas Metal Arc |
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and ropy looking bead, or electrode | Welding Guide” |
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stubbing into plate while welding. | b. Improper gas shielding - Clean |
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| gas nozzle. Make certain that gas |
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| diffuser is not empty or turned off. |
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| Make certain gas flow rate is |
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| proper. |
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| Remove gun liner and check rub- |
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| ber seal for any sign of deteriora- |
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| tion or damage. Be sure set |
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| screw in connector block is in |
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| place and tightened against the |
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| liner bushing. |
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CAUTION
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.
